Which of the following statements about the effect of surface ):tck9 hm f0dmarea and volume on the ce)9:fckm dh t0mll’s processes is false?

  Which statement best describes stemuo3u 7e/;cdh /k.0icr4n hvbv cells?

  Which is a correct description of the cell type adapted for gas exchange in thet4xw:y p .;e)qmt kh*d lungt he xt*:q; p4yw).dmks?

  Which of the following expla kq9ym im6;ig.0of3 jlins the limitations on cell size?

  What is this cell's most likely primary functe(4 y-3l - nyllds1nso2 jtdj-q:ab ( sfd;6laion, and where could it be located in a mammal syds q 4ljl :s dd-on- n16eya(lj(bl2tf-;3a?

  Which of the following characteristics of type(nq+do f drprwve5rk.x5 b19, I pneumocytes contribute to increasing the ratek(dp9d+eq1b 5x.5 r r wfrvn,o of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow transplant from a 36 year olk78dqa 6,wdx e4vdrsr7 m.a6ud. One of the functions of these cells is to prodes4u,7. wk 8rv6dd qxr daa7m6uce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle8ri wwkw-yd jnow3(:58 f.vlk cells and striated muscle fib wyl(w- i8owrwjknk:85v 3.dfres?

Below is a diagram of a motor neuron. Neurons are the lo gx07y2pv)yyxr1 u;rg+ 2fabfngest cells in the human bod f;a gr7+)v12yxx0y ugr2f ypby.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant rb0ew6 t f+fp) :7qetgtespiratory distress syndrome, which could be caused by a lack of sufficient6qf7t0 wpbfeet) :g+t surfactant in the pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason tha:4 sdx zxohdoww(er ;a40g /(xt embryonic stem cells are not used in the treatment of le/:0 44dhdxwxg;xz eoo rw(sa(ukaemia?

  The table shows the diameters of red blood cells from different o ujq.)-hbmqfueg- (zkv./l a7rganisms. Which rmqf ) .(v/u.e-q7bkgzhlaj -ued blood cell will have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal convolut/u4n7. ((hcv alrk +kaxnt7o5af fc6p .m0xased tubule make these cells more adapted to the functions thefm+ /l5pxrf .uho4a7nkcx(. 7a 0vaks6c tn(ay perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stem px;g9 fac5;2 an yzj;ucells and specialised cells is/are not truu ;;a aj9y ;fxng5zpc2e?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is the correct order from smallest to largest? .o/zy.. v(v(vhtfkhf( zfhovv h/vty .f.(.k

  Which row in the following table gives the correct disadva: 3mdl 70 xpc1d9jfwamyo+hx2 ntages of the different stem cell sources for therapeuocdmjx7:pay+3dm0h 2l 1 9xw ftic uses?

1.Describe how the use of stem cells may be used to treat type I dianit8xje. ,a97,-(jfbpa o xs ibetes in the futurjj7nxa,x f9b i (t-e,iposa 8.e.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised ce-pao b f8d3v3l 7:4 wtnibajc7lls (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.